Project 141 - Slovenia-Hungary corridor

The project consists of a new double circuit 400 kV line Cirkovce-Pince and anew 400 kV Cirkovce substation (Slovenia) by which a new connection to onecircuit of the existing double circuit interconnection line between Hungary andCroatia will be made, thus creating two new cross border interconnection betweenSlovenia and Hungary and between Slovenia and Croatia. Existing 220 kV lines ofthe corridor Cirkovce-Divaca will be upgraded to 400 kV level.

Classification Mid-term Project Boundary Hungary - Slovenia PCI label 3.9

Promoted by ELES;MAVIR

Investments GTC Evolution Investment Contribution Substation Substation Present Commissioning since Description Evolution Driver ID 1 2 Status Date TYNDP 2014 New 400 kV connection Heviz (HU) ELES is currently in the between Slovenia, Cirkovce Design & 223 100% Zerjavenec 2019 Delayed process of gaining easment Hungary and Croatia (SI) Permitting (HR) from the land owners.

The project is splitted in three phases: - 1st phase corridor Divača-Kleče- Upgrade of the internal Beričevo (2020 - in 220 kV lines to 400 kV Cirkovce Design & Investment permitting) - 2nd phase 225 100% Divaca (SI) 2025 voltage level. (SI) Permitting on time corridor Beričevo-Podlog (2025 - under consideration) - 3rd phase corridor Podlog- Cirkovce (2025 - under consideration).

Additional Information

Project PCI website:

PCI project - 3.9.1 https://ec.europa.eu/energy/sites/ener/files/documents/pci_3_9_1_en.pdf

PCI project - 3.9.2 https://ec.europa.eu/energy/sites/ener/files/documents/pci_3_9_2_en.pdf

PCI project - 3.9.3 https://ec.europa.eu/energy/sites/ener/files/documents/pci_3_9_3_en.pdf

PCI project - 3.9.4 https://ec.europa.eu/energy/sites/ener/files/documents/pci_3_9_4_en.pdf

2nd PCI list: https://ec.europa.eu/energy/sites/ener/files/documents/5_2%20PCI%20annex.pdf

Clustering approach:

To improve secure and reliable operation and to reach the substantial transmission capacity contribution of this project, it is essential to build all investments which are part of the same corridor. After the connection of the new SI-HU/HR cross- border OHL, it is crucial to maintain the secure and reliable operation of Slovenian transmission system. Therefore, three internal investments which are part of upgrading 220 kV grid to 400 kV level are necessary. In the case of building just one investment, the transmission capacity contribution and security of operation will be lower.

Based on upper mentioned facts it is crucial to cluster all these investments together, to fully utilize the possible benefits.

Slovenian NPD document (only in slovenian): http://www.eles.si/za-poslovne-uporabnike/razvoj-in-uporaba-prenosnega-omrezja/strategija-razvoja-elektroenergetskega- sistema-rs.aspx

Hungarian National Development Plan (only in Hungarian): http://www.mavir.hu/documents/10258/15454/HFT_2015.pdf

Investment needs

The project 141 aims to increase the transfer capacity on in the predominant East-West direction by investments that will create new electricity corridors and possibility to access the new energy market and to import/export electricity to surrounding countries. The project 141 supports the large scale integration of new RES in the South East and Central East Europe. Project will improve security and realibility of operatiopn of the Slovenian transmission system which is heavy loaded during the year due to the hight transit flows.

Arrows on the figure represent annual energy flow [GWh] and refers to each vision 1, 2, 3, 4 respectively.

For all visions predominant direction of bulk flows is East->West.

The results showed, that project 141 is adequate for all four visions and there is no need for further investigations on this border. Project Cost Benefit Analysis

This project has been assessed by ENTSO-E in line with the Cost Benefit Analysis methodology, approved by the EC in February 2015.

The indicators B6/B7 reflect particular technical system aspects of projects based on a summation of qualitative performance indicators, in line with the CBA methodology; these cannot be used as a proxy for the security of supply indicator.

The assessment of losses variations induced by the projects improved in the TYNDP 2016 compared to the TYNDP 2014 with a comprehensive all year round computations on a wide-area model capturing all relevant flows.

The results must however be considered with caution and not totally reliable due to their very high sensitivity to assumptions regarding the detailed location of generation which are not secured. General CBA Indicators Delta GTC contribution (2020) [MW] SI-HU : 1650 HU -SI: 650 Delta GTC contribution (2030) [MW] SI-HU : 800 HU -SI: 1050 Capex Costs 2015 (M€) 345 Source: Project Promoter

The difference in investment cost from TYNDP 2014 is due to the novelation of Cost explanation the investment plan.

S1 More than 100km S2 15-25km B6 0 B7 ++ Scenario specific CBA indicators EP2020 Vision 1 Vision 2 Vision 3 Vision 4

B1 SoS (MWh/yr) N/A N/A N/A N/A N/A B2 SEW (MEuros/yr) 10 ±< 10 80 ±10 80 ±10 10 ±10 30 ±10 B3 RES integration (GWh/yr) <10 <10 <10 <10 <10 B4 Losses (GWh/yr) 25 ±25 -125 ±25 -125 ±25 -100 ±25 -50 ±25 B4 Losses (Meuros/yr) 1 ±1 -7 ±2 -6 ±1 -6 ±2 -4 ±2 B5 CO2 Emissions (kT/year) 200 ±80 900 ±100 800 ±100 -200 ±100 -300 ±100

Comment on SoS indicator:

Project 141 is important for managing extreme contingency situations and would play big security role in power evacuation from nuclear power plant located in Krško.